From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755272Ab0IVTPW (ORCPT ); Wed, 22 Sep 2010 15:15:22 -0400 Received: from mx1.redhat.com ([209.132.183.28]:17880 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754985Ab0IVTPU (ORCPT ); Wed, 22 Sep 2010 15:15:20 -0400 Date: Wed, 22 Sep 2010 15:14:40 -0400 From: "Frank Ch. Eigler" To: Peter Zijlstra Cc: Steven Rostedt , Arjan van de Ven , Jean Pihet , Thomas Renninger , Ingo Molnar , Len Brown , arjan@infradead.org, Kevin Hilman , linux-kernel@vger.kernel.org, linux-pm@lists.linux-foundation.org, linux-omap@vger.kernel.org, linux-perf-users@vger.kernel.org, linux-trace-users@vger.kernel.org Subject: Re: [PATCH] tracing, perf: add more power related events Message-ID: <20100922191440.GE2727@redhat.com> References: <201009180026.59482.trenn@suse.de> <4C9A21AD.1000800@linux.intel.com> <4C9A2FB3.105@linux.intel.com> <1285173835.2275.1026.camel@laptop> <4C9A37AE.2010509@linux.intel.com> <1285176629.2275.1033.camel@laptop> <1285179355.26872.27.camel@gandalf.stny.rr.com> <1285180000.2275.1036.camel@laptop> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1285180000.2275.1036.camel@laptop> User-Agent: Mutt/1.4.2.2i Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi - On Wed, Sep 22, 2010 at 08:26:40PM +0200, Peter Zijlstra wrote: > [...] > > Not sure what you mean by "double tracepoints" > Two different tracepoints in the same location. Another possibility may be to provide a backward-compatibility module that maps new tracepoints to old ones. On demand, it could attach to the new tracepoints, and export those callbacks as clones of the old pseudo-ABI: same old names & parameters. If the new ones supply a superset of events & data, this is technically possible. - FChE